Ben E. Laden, a Baltimore-based economist, was elected last week as president of the National Association of Business Economists.

Laden, 45, is chief economist and vice president of T. Rowe Price Associates. He succeeds A. Nicholas Filippello of the Monsanto Co. in St. Louis.

Kathleen M. Cooper of Security Pacific National Bank in Los Angeles was elected as the association's vice president.

Other NABE officers elected for 1984-85 were Paul A. Anton of First Bank Minneapolis; W. Van Bussman of TRW Inc. in Cleveland; Kenneth H. Militzer of American Telephone & Telegraph Co. in New Brunswick, N.J., and Jay N. Woodworth of Bankers Trust Co. in New York. All were named directors.

NABE, founded 25 years ago, has chapters in 45 cities.

The National Society of Public Accountants has chosen Robert Grille as its president.

Grille has been a public accountant in Falls Church for 30 years and an NSPA member for 23. He has held several association offices, including those of first and second vice president, governor for the NSPA District III (Maryland, Virginia and West Virginia), and Virginia state director.

Grille has also served since 1968 as the cochairman of the annual Tri-Tax Seminar and as chairman of several other committees for the tri-state region, which includes Virginia, Maryland and the District of Columbia. He also has received the Outstanding State Director Award twice, in 1975 and 1977.

NSPA, with headquarters in Alexandria, has some 17,000 member accountants and tax specialists.

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The Prince George's County Society of Certified Financial Planners has been formed to increase public awareness of financial planning and to offer a forum for local certified financial planners, said newly elected president Douglas E. Morrison.

Other elected officers are: Vice President Sheldon E. Sacks, Secretary Henry E. Otten, and Treasurer Patricia M. Tengel. The society is one of 14 groups spun off from the national ICFP organization based in Denver.

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The National Association of Professional Insurance Agents has promoted Patricia A. Borowski and Donna Eller to the newly created positions of vice president for government affairs and vice president for group insurance services, respectively.

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Jean Head Sisco, a partner in Sisco Associates, and A. A. Sommer, a partner in the law firm of Morgan, Lewis & Bockius, have been elected to the board of directors of the National Association of Corporate Directors .

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The Association of American Railroads has promoted Nancy L. Wilson to assistant vice president for government relations. Wilson recently held the position of director of government relations for AAR.

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Louis L. Guy of Annandale has been elected vice president of the American Academy of Environmental Engineers . Guy is a water and wastewater engineering consultant with Guy & Davis in Burke.

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Albert H. Teich has been chosen to head the public sector office of the American Association for the Advancement of Science . Teich has served as a manager of the association's science policy studies since 1980.

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Sharon Mills has been elected treasurer of the Washington Printing Guild of the Printing Industry of Metropolitan Washington . The guild represents the graphic arts industry. Mills, an account executive with Cascio-Wolf, a Springfield-based color printer, is the first woman to hold an office in the 37-year history of the guild.

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The American Public Transit Association has named Charles Bishop as its director of government affairs. APTA membership includes more than 800 industry and transit systems manufacturers and suppliers.